Film-developer



0. FLY HALMER. FILM DEVELOP'ER. I xPPLlcAloN man Amzs; 1920.

Patented June 14, 1921.

W 552i MHH E QN N N O. f-T Hal/ner i* INVENTOR.

STATES Param orrica.

" OTTO F. HALMER, LOS MTGFLES, CALIFORNIA.

FILM-DEVELQER.

Specification ofiLetters Patent.

Patented inne 14, 1921.

Application filed April 29, 1920 Serial No. 377,542.

useful Improvements in Film-Developers,

of which the following is a specification.

This invention is a film developer and has for its object the provision of an improved construction whereby a roll of films may be supported within a receptacle containing developing fluid in such manner as to be moved back and forth through the fiuid for causing intimate contact of all parts of the roll of films with the developing medium.

Further objects of the invention will be readily understood from the following description of the accompanying drawings, in which- Figure 1 is a perspective view of a film developer constructed in accordance with the invention.

Fig. 2 is a transverse section on the line 2 2 of Fig. 1.

Fig. 3 is a longitudinal section on the line 3--3 of Fig. 1L

Fig. 4 is a side elevation of the end of one of the supporting rods for the roll of films.

The improved developer consists essentially of a receptacle l for the developing fluid, a supporting head 2 .removably mounted upon the o en end of the receptacle, and supporting rods 3. extending from said head into the receptacle and arranged to have the respective ends of a roll of films 4 secured thereto, the supporting head carrying mechanism for rotating said supporting rods so as to wind the roll of films from one supporting rod to the other and thereby move the roll of films through the developing fiuid in the receptacle.

The supporting head upon the open end of the receptacle 1 is shown ascomprising crossed bars 5 and 6 'forming a spider received over the end of the receptacle and having an annular band 7 arranged to embrace the outside of the receptacle securedv to the downwardly bent ends 8 of said crossed bars. Retaining lips are arranged to engage the inner surface of the receptacle i, these lips being shown as spring lips 9 comprising downwardly bent ends of a strip 10 secured to the under side of one of the crossed bars of the supporting head. By.

the arrangement, as thus described, the supporting head ma be readily slipped over the open end of tile receptacle 1 and as readily removed therefrom, the spring li s 9 holding the supporting head comparative y rigid upon the receptacle.

The supporting rods carried by the head, as thus described, are, preferably, journaled in one of the crossed bars of the head, say the bar 5, and are shown for this purpose as provided with bearing collars 11 resting against the upper surface of the bar 5. Pin

ions 12 are fixed upon the supporting rods i above the bearing collars, and the ends of the rods, -preferably, terminate in pins 13 arranged to be engaged by the fingers for separately` rotating the respective supporting rods. The supporting rods may be journaled in brackets 14 between the pinions and the actuating pins, these brackets being shown as secured to the bar 5.

The connection between the ends of a roll.

of films and the respective su porting rods may consist of an elongated s ot 15 formed in each of the 'respective supporting rods, the latter being hollow to form an interior space 16 throughout the length of said slots.

The ends of these slots at the lower ends of the supporting rods A9are, preferably, cut away, as shown at .17 in order to provide a guideway to assist 1n readily positioning thc rod'.-

Vhen attaching the end of a film roll to the supporting rod the end of the film is, preferably., reverselv bent upon the film, as shown at'18, and this bent end is then inserted in the hollow rod with the hlm projecting through the slot 15 and the bent portion of the film engaging the walls of said slot for connecting the film to the supporting rod. The opposite ends of a film roll are thus secured to the respective supporting rods'and the supporting rods are arranged to be simultaneously rotated for rolling the film off of one supporting rod and on to the other. For this purpose the following described mechanism may be employed.

A stub shaft 19 is mounted upon the supporting head of the developer as by extending the shaft through the crossed bars 5- and 6 and retaining it in position by a nut 20 having threaded engagement with the end of the shaft. A pinion 21 is loosely slidabiy journaled upon the stub shaft and is arend of a film roll within the hollow supportico ranged to mesh withipinions 12 atits opposite sides so that turning of the pinlon 21 will rotate the supporting rods 3 to wind and unwind the film from one supporting.l

shaft so as to disengage pinions 12, as clearly shown in Fig. 3. Thls movement of' the pinion 21 is, preferably, controlled by a lever 24 having a slotted end 25 loosely received upon the shaft 19 beneath the pinion 21. The lever is pivoted. at 26 in a suitable bracket-27 so that the outer end of the lever may be engaged by the finger for'swinging the lever to raise and lower the pinion 21. The pivotal mount 26 of this lever 1s, referably, a frictional pivot so arranged t at the lever will remain in either position to which it islswung for retaining the pinion 21 in either operative or inoperative position. Sliding movement of the the stub shaft 19 may be limited by a pin 28 having a threaded engagement 29 with the end of the stub shaft, so that by remov ing said pin the pinion 21may be completely removed from the su porting head of the developer as may be ound convenient durin@r transportation of the developer.

iln operation thel supporting head andv rods of the developer are removed from the receptacle l'when it is desired to secure a roll of films to the supporting rods andthe pinion 21 is moved to its inoperative position. The ends of the film roll may then be inserted in the respective ends of the supporting rods, as previously described, and the supporting rods be independentlyrotated by their pins 13 for initially rolling the film roll upon the supporting rods. The supporting head is then positioned upon the receptacle 1 with the rol of lilm immersed in the developing fiuid' in the receptacle and the pinion 21 is moved to its operative position so that by subsequent rotation of this pinion in reversedirections the roll-of films may be wound and unwound from one supporting rod to the other so as to draw the films back and forth throughv the developing medium.

Various changes` may be made without.

inion 21 upon departing from the as claimed. What is claimed is:

`1:A film developer' comprising a receptacle for the developing medium, and rospiit 'p of the invention tatable supporting rods extending within' sald receptacle in spaced relation, said supporting rods being tubular and slotted up- Wardly from their lower ends and adapted to receidvffftheespective ends of a film so that the `fil-rn may be wound from one ofthe supports tothe other.

2. A film developer comprising a receptacle for the developinfg medium, a supporting head removably p .aced over the end of said receptfii le`, supportingl rods journaled on said head 'an'dextending into the receptacle, said supporting rods arranged to engage a film so that the latter may be wound from one supporting rod to the other and means upon said supporting head for simultaneously rotating said supporting rods.

3. A lm developer comprising a receptacle for the developing medium', a supporting head removably placedover the end of said receptacle, supporting' rods journaled on said head and extending into' the receptacle, said supporting rods arranged to engage a 'film so that' the latter may be wound from o ne supporting rod to the other, a manually rotated member rods for simultaneous and means for shifting said` manually rotated member out of engagement with said supporting rods.

4.' A film developer comprising a] receptacle for the developin medium, a supportupon said supporting l head arranged to engage vsald supporting y rotating the latter,

ranged to engage said pinions f0.11'otating the same, and means for slidin .saidvsecond mentioned pinion lengthwise o lts axis out of engagement with said first mentioned pinions. f

In testimony whereof I name to this specification.

i OTTO F. HALMER.

have signed my 

